package com.chen.androidthreadtest;

import android.os.AsyncTask;

public class DownLoadTask extends AsyncTask<Void,Integer,Boolean> {

    @Override
    protected void onPreExecute() {
        super.onPreExecute();
        // 显示进度对话框
    }

    @Override
    protected Boolean doInBackground(Void... voids) {
        return null;
    }
}
